{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x75fdbe186bbe60e83ad5abee28bad82e2aa75f85810ba7a7d63078245adace5f",
    "signature": "0x8020cca6ad0485b2632110570b0d9287306930fa960ddc5e635e6c0535049b936ab772ee9768ad456038c2161b2e081b0fb82954a83cdd12491267b96cab1ba71b",
    "signer": "0xC876423a3b87ca321806d467C4096bddab545482",
    "userId": "553289444"
  }
}